Question

- How do we use sample results to estimate values of population parameters? - What are...

- How do we use sample results to estimate values of population parameters?

- What are the best point estimates of the population proportion "p", population mean "μ" and standard deviation "σ"? Why?

- How accurate is the sample result of 85% likely to be?

- Given that only 1,007 people were polled in the population of 241,472,385 adults, is the sample sample size too small to be meaningful?

- What is a critical value? How is it related to the confidence level?

- What is the Student t distribution?

Directions: you are required to “Start a New Thread” by Day 3. Initial post should be 200-300 words

Homework Answers

Answer #1

thank you.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A population has parameters μ=126.3μ=126.3 and σ=57.9σ=57.9. You intend to draw a random sample of size...
A population has parameters μ=126.3μ=126.3 and σ=57.9σ=57.9. You intend to draw a random sample of size n=221n=221. What is the mean of the distribution of sample means? μ¯x=μx¯= What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) σ¯x=σx¯=
A population has parameters μ=126.3μ=126.3 and σ=57.9σ=57.9. You intend to draw a random sample of size...
A population has parameters μ=126.3μ=126.3 and σ=57.9σ=57.9. You intend to draw a random sample of size n=221n=221. What is the mean of the distribution of sample means? μ¯x=μx¯= What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) σ¯x=σx¯=
Suppose we are interested in how well people do on a standardized test when they take...
Suppose we are interested in how well people do on a standardized test when they take it for a second time. In a random sample of 400 students who took the test for a second time, students gained an average of X-bar = 12 points. Let’s say that the sample comes from a population with σ = 42. The 95% confidence interval for μ (the mean point gain) is: μ = 12 ± (1.96) (42/√400) = 12 ± 4.12 =...
This is all one question under a post. What is the difference between a frequency distribution...
This is all one question under a post. What is the difference between a frequency distribution and a sampling distribution? Describe the circumstances under which the Central Limit can/should be applied. For example: imagine you were talking to a classmate who needs help with this topic. How do you know when to use the Central Limit Theorem. Describe how to use the Central Limit Theorem. That is, what about using it is the same as previous work you've done? What...
Homework 2 Show Your Work! 1. The following 10 numbers were drawn from a population. Is...
Homework 2 Show Your Work! 1. The following 10 numbers were drawn from a population. Is it likely that these numbers came from a population with a mean of 13? Evaluate with a two-tailed test at alpha of .05. 5, 7, 7, 10, 10, 10, 11, 12, 12, 13 a. State in words what your H1 and H0 would be. b. What kind of test would you use (i.e. Related-Samples t-test, z-test, etc.)? c. What is your df? What is...
Do all the following problems. I. Choose the best answer for each multiple choice. Please use...
Do all the following problems. I. Choose the best answer for each multiple choice. Please use CAPITAL letters to indicate your answer and write neatly. (30 points) 1. ____ 4.____ 7. ____ 10.____ 13. ____ 2. ____ 5.____ 8. ____ 11.____ 14. ____ 3. ____ 6.____ 9. ____ 12.____ 15. ____ Whenever the population standard deviation is unknown and the population has a normal or near-normal distribution, which distribution is used in developing an interval estimation? A. standard distribution B....
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean always equals the population mean. The average sample mean, over all possible samples, equals the population mean. The sample mean will only vary a little from the population mean. The sample mean has a normal distribution. 2.Which of the following statements is CORRECTabout the sampling distribution of the sample mean: The standard error of the sample mean will decrease as the sample size increases....
4) The correlation coefficient r is a sample statistic. What does it tell us about the...
4) The correlation coefficient r is a sample statistic. What does it tell us about the value of the population correlation coefficient ρ (Greek letter rho)? You do not know how to build the formal structure of hypothesis tests of ρ yet. However, there is a quick way to determine if the sample evidence based on ρ is strong enough to conclude that there is some population correlation between the variables. In other words, we can use the value of...
Assignment: What are the main arguments in the article? Please answer within 5 hours. It is...
Assignment: What are the main arguments in the article? Please answer within 5 hours. It is extremely urgent!!!!!!!!!!!!!!!!!!!!!!!! --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- BIOETHICS. Bioethics as a field is relatively new, emerging only in the late 1960s, though many of the questions it addresses are as old as medicine itself. When Hippocrates wrote his now famous dictum Primum non nocere (First, do no harm), he was grappling with one of the core issues still facing human medicine, namely, the role and duty of the...
QUESTION 1 ? What is the relationship between family dysfunction and schizophrenia? a. ?Research has substantiated...
QUESTION 1 ? What is the relationship between family dysfunction and schizophrenia? a. ?Research has substantiated a link between family dysfunction and schizophrenia but can't say which causes the other. b. ?Family dysfunction is a major causative factor for schizophrenia. c. ?Research has failed to substantiate a direct causal link between family dysfunction and schizophrenia. d. ?Family dysfunction plays a minor role in developing schizophrenia. 1.00000 points    QUESTION 2 ? Chuck has no life plan; he simply lives from...